We divide 43177970 by 815
The aim is to understand the frequency of 815 in 43177970.

Going ahead to step 1:
815 can be fit into 4 0 times, resulting in a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Take the next digit (3) from the dividend and append it to 4, then repeat: 43 / 815

Let's proceed to step 2:
815 goes into 43 0 times with a remainder of 43.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 43, we end up with 43.
Grab the next digit (1) from the dividend, add it to 43, then carry on: 431 / 815

Moving on to step 3:
431 divided by 815 is 0 with a remainder of 431.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 431 and we're left with 431.
Fetch the next digit (7) from the dividend, attach it to 431 and continue: 4317 / 815

Advancing to step 4:
815 can be fit into 4317 5 times, resulting in a remainder of 242.
Put 5 as the next digit of the answer. 
Result so far: 5.0
If we subtract 4075 from 4317, we get 242.
Include the next digit (7) from the dividend after 242, then repeat: 2427 / 815

On to step 5:
The number 815 fits into 2427 2 times, leaving a remainder of 797.
Use 2 as the next digit of our solution. 
Result so far: 52.0
If we subtract 1630 from 2427, we get 797.
Append the next digit (9) from the dividend to 797 and continue with: 7979 / 815

Step 6:
7979 divided by 815 is 9 with a remainder of 644.
Use 9 as the next digit of our solution. 
Result so far: 529.0
Deduct 7335 from 7979 and we're left with 644.
Append the next digit (7) from the dividend to 644 and continue with: 6447 / 815

Advancing to step 7:
815 goes into 6447 7 times with a remainder of 742.
Put 7 as the next digit of the answer. 
Result so far: 5297.0
If we subtract 5705 from 6447, we get 742.
Append the next digit (0) from the dividend to 742 and continue with: 7420 / 815

Moving on to step 8:
If we divide 7420 by 815, we get 9 and a remainder of 85.
Record the quotient 9 as the next digit in the result. 
Result so far: 52979.0
The remainder is 85 after subtracting 7335 from 7420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

Moving on to step 9:
When dividing 850 by 815, we get 1 with a remainder of 35.
Record the quotient 1 as the next digit in the result. 
Result so far: 52979.1
The remainder is 35 after subtracting 815 from 850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Advancing to step 10:
815 goes into 350 0 times with a remainder of 350.
Use 0 as the next digit of our solution. 
Result so far: 52979.1
Subtracting 0 from 350 leaves us with 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3500, and continue the process.

Going ahead to step 11:
The number 815 fits into 3500 4 times, leaving a remainder of 240.
Write down 4 as next digit of the result. 
Result so far: 52979.104
Deduct 3260 from 3500 and we're left with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Going ahead to step 12:
815 can be fit into 2400 2 times, resulting in a remainder of 770.
Put 2 as the next digit of the answer. 
Result so far: 52979.1042
If we subtract 1630 from 2400, we get 770.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7700, and continue the process.

Moving on to step 13:
The number 815 fits into 7700 9 times, leaving a remainder of 365.
Use 9 as the next digit of our solution. 
Result so far: 52979.10429
Deduct 7335 from 7700 and we're left with 365.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3650, and continue the process.

On to step 14:
815 goes into 3650 4 times with a remainder of 390.
Use 4 as the next digit of our solution. 
Result so far: 52979.104294
If we take 3260 away from 3650, we end up with 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3900, and continue the process.

Step 15:
3900 divided by 815 is 4 with a remainder of 640.
Write down 4 as next digit of the result. 
Result so far: 52979.1042944
If we subtract 3260 from 3900, we get 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

The final outcome is 52979.1042944, with a leftover of 6.4e-06.